Commodore PET Diagnostic Tester – MCL_PetDoctor

The MCL_PetDoctor is a suite of diagnostic tests which run on the MCL65+ board which is a drop-in replacement for the 6502 CPU which can emulate a cycle accurate processor along with all all of the computer’s RAM and ROM. The MCL_PetDoctor diagnostics perform exhaustive tests on a PET motherboard at the optimal location [ ]